const system = uni.getSystemInfoSync();	
export const getStatusBarHeight = () => system.statusBarHeight || 15;

export const getTitleBarHeight = () =>{
		if(uni.getMenuButtonBoundingClientRect){
			const { top , height } = uni.getMenuButtonBoundingClientRect();
			return height + (top - getStatusBarHeight())*2;
		}else{
			return 40;
		}
	}
	
export const getNavBarHeight = ()=>getStatusBarHeight()+getTitleBarHeight();